Portable saw welding clamp



p 1952 E. F. SPENCER 2,610,600

PORTABLE SAW .WELDING CLAMP Filed m 7, 1948 mvam'on 1 ATTORNEY Patented Sept. 16, 1952 Pon'r BLEsAw cLAiur. l

; Earl F.'Spencer, Vancouver,-British Columbia, L 3

Application May 7, 1948, Serial No. 25,551

This invention relates to a portable clamp particularly for welding saw blades, but which may be used for other purposes as well.

An object of the present invention is the provi sion of a portable saw welding clamp which may be'used to hold asaw blade in position whilea crack-therein is being welded.

A further object is the provision of a clamp forholding a tooth in place in relation to a saw blade while it is being welded thereto.

This clamp consists of a suitablesupport having an anvil slidably mounted therein. Clamping means carried by the support may hook over an edge of "a saw blade to hold the clamp in position. Suitable meansis provided for moving the anvil out of the support to press the end thereof against the blade hooked by the clamping means. If the clamp is to be used in connection with welding a crack in theblade, it isso located that the anvil extends on both sides of the crack so that it properly lines up the metal for welding. The clamping means is adjustable so that the device may be secured'to saws of diiferent types and it may be accurately positioned inrelation to a crack therein. A holder may be resiliently mounted on'the support for retaining a tooth to be welded on to .a saw blade in the proper position in relationthereto for the welding operation. 7

Other objects and features of the invention will appear from the accompanying description reference to the drawings, in which: I I

Figure 1 is a plan view of the-clamp in position on a saw blade with a crack in the toothed edge thereof.

Figure 2 is "a side elevationoi the device in this position,

Figure 3 is a longitudinal section through the device,

Figure 4 is an end view of the device holding a tooth in'position to be welded on to a saw blade, and

Figure 5 illustrates the use of the clamp on the straight edge of a saw blade. I

Referring more particularly to the drawings, in is a suitable support for an anvil llslidably mounted therein. In this form of the invention, the support is in the form of an open-ended housing, and the anvil is in the form of a relatively large plunger adapted to be moved out of the open end of the housing. The anvil is formed with a fiat outer face iii. A pin [-5 may project outwardly from the side of the anvil through an elongated slot I6 formed in the support housing III. This slot extends longitudinally with 1 '1 Claim. (01 113- 99) of the housing and limits the amount Of travel oftheanviLf" Suitable means is provided for moving the anvil out of the housing. One way'of accomplishing this is by means of ascrew shaft 18 threaded through the outer end of the housing and bearing against the. inner 'endof the anvil. This shaft maybeprovided with a turning handle I!) 'at its outer end. When the shaft is rotated in one direction, the anvil is pressed out of the housing, and when it is rotated in. the opposite direction the anvil is'free to move back into the housing. If desired, the. shaft l 8 may be rotatably con-f nected to the anvil to draw it backinto the hou's Suitable clampingmeans .is provided for hooking over an edge of a saw blade in o'rdertohold the latter againsttheouter face of the anvil as it is moved out of the housing. 1 This clamping Ineans'is preferably in the form of arms 22' and 2 3"hingedly mounted on opposite'sides of the housing and having hooks 24 and 25, respective 1y,fo'rmed at their outer ends. These arms are preferably hingedly and adjustably connectedat their inner ends to the housing. To this end, bracketslza and 29 areprqvided with laterally projecting lugs 30 and 31 which are 'pivotally connected to the endof the housing lllby bolts 32 and 33. The farms 22 and 23 are provided with elongated slots 35 and 36 adjacent their inner ing arms 22 and 23 may ber noved outwardly or inwardl q thiey ma e m 've 'w r s away from the housing. Similarly. when'the bolts -32 and 33 are loosened the brackets 28 and 29 may be pivoted around said bolts further to adjust the position of the outer ends or hooks of the arms in relation to the housing and anvil.

If desired, a holder 40 may be resiliently mounted on the support l0.

in the inoperative position shown in Figure 1..

In the drawings; represents a saw blade, and inFigure 1, this blade has a crack 5| extending from the toothed edge .thereof towards its center.

This holder may extend freely through a sleeve 4| which is se- In Figure 4, one of the teeth of the saw blade has been broken off or removed, and a new tooth 53 is to be welded in the place of the old one. As this device is particularly designed for use with relatively large band saws, the saw blade is usually standing on edge with its teeth at the top, as clearly shown in Figure 4. In this case, the welding clamp lies in a horizontal position when in use, and therefore, a suitablebrace 55 may be provided which is connected to a side of the housing II) by a bolt 56 and projects outwardly from said housing at an angle, and is formed teeth to hold'the clamp in position. The hooks at this outer end with a fiat bearing surface 51.

which lies parallel with the outer end' of the housing but spaced outwardly alittle beyond said end. This brace may have a hole 60 formed therein.

In use, the anvil H is positioned within the:

24 and 25 are placed over the saw edge and the clamp'is operated in the same manner as described above;

What I claim as my invention is A portable saw welding clamp comprising a housing open at one end and closed at its opposite end, a heavy plunger anvil slidably mounted in the housing and projecting outwardly from .one end thereof, said plunger anvil having a flat outer face lying substantially at right angles to the axis thereof, brackets at opposite sides of support housing. Then the bolts 31 andv 38 are loosened and the clamping arms 22 and 23 moved into positions where their hooks 24 and 25 may engage the saw blade between the teeth. thereof, see Figure 51. After the bolts are tightened, the

handle 19 maybeturned to urge the anvil outwardly until its outer end bears against the saw blade. In Figure 1, the deviceis'fpositioned so that the anvil overlaps the crack'f5 I. As the anvil is-movedoutwardly, the blade, which is hooked by the clamping means, is pressed against the hooksfifl and25 until .themetal on. the opposite sides'lof the crack is;.lined.up for welding; At this time, the brace 55 bears againstthe saw blade .to help. keep the. device in-position. It is now a very simple matter to'weld the crack in the usual manner.

When it is desired to weld a tooth 53 on to th'e blade, the clamping device is applied to the blade as described above. ;In this case, however, the anvil overlaps the point where thenew tooth is to be welded. vAfter the-device haslbeen clamped in position, the holder 40 is pulled towards the saw blade until. itsfinger 42 canberotated to overlap the. outer end of theanvil. Then the toothis. moved-into position'for weldingrand;

Whenthe holder i released, the spring 43 moves the overlapped finger towards the anvil to clamp the tooth thereagainst in position for welding. As the end of the anvil is flat and overlaps both the saw: blade and tooth, the surfaces thereof are in line, and the tooth maybe weldedin position in the usual manner. Itmay be necessary first to spot weld the tooth in placeand then remove the finger 42' to, its inoperative position, before thefwelding operation i completed;

.It is not,.practical..to turnlarge band saw overwhenthere is a crack in-the backer straight the housing, each bracket having a lug overlap,- ping and pivotally connected to the closed end of the housing, a clamping arm for each bracket, each arm having a longitudinal slot adjacent one end; a bolt extending through'each bracket and the slot of an armior adjustably and hingedly connecting. said armto the bracket,said arms extending beyond" the end of the housing from which the. plunger anvil; projects, hooks .onjthe free ends of the a ms, saidhooks extending in the same direction'substantially parallel toieach other and being adaptedto fit over an? edge of a saw blade resting fiat against the outer face of the plunger anvil, and means for moving the plunger anvil against .ab1ade heldby'the hooks.

, Q JEAR EN ER- j REFERE C S-Gi f The iollowing references. are of i eeordin the file oi tliis patent: V

Number i Name v Date I 25l,950 Robinson .f- 'Jan; 3," 1882 429,019. Disston. May 27, 1890 625,007 wollmanihlufe ilviay 16, 1899 680,304 Wightman Aug. 13, 1901 979,305 Hunt "Dec. 20, 1910 1,145,199 H Kobert July 6, 1915 1,767,935 McDaniel June 24', 1930 1,915,847 Brant June 27, 1933 1,930,642 Clark Oct. 1,,1933

2186,64 1 Jones l Jan. 9,1940

2,256,554 Epstein Sept,2 3, l94l 2,276,782 7 ","Jones Mar. 17, 1942 2,337,383 Franz 1 Dec. 21,1943

2,352,697 Dittrich July '4, 19%.

Bourdette Nov.;2, 1948 

